[SAC] [support.osuosl.org #23813] OSGeo3 Raid battery replacement

[Justin Dugger via RT]

See replies inline.

On Thu Apr 24 15:47:59 2014, tech at wildintellect.com wrote:
> OSL team,
> 
> Now that osgeo4 disks and battery are replaced and working any chance we
> could to osgeo3's battery tomorrow Friday Apr 24 ~ 1pm PST?

Sounds fine.

> We've noticed the Web vm is having some big i/o issues. Not sure if it's
> the raid card, drbd or kvm cache related. One option is to migrate Web
> over to osgeo4 for now and see if that changes things. Any other ideas
> are welcome.

Caching solutions like varnish tend to reduce I/O demands for webapps, but
this is sort of hard to debug without poking around the various VMs etc.

What I can say is that I/O on osgeo3 is dominated by tracsvn, and that
replacing the battery should cause the RAID firmware to go back to writeback mode.

> We'd probably want to migrate over Secure also while osgeo3 is down.
> Which might mean we need to turn off something on osgeo4.

We can coordinate this over IRC if you desire.

Justin Dugger
OSU Open Source Lab